Other existing wallets focus on safety or ease of use, but not both. There are simple wallets for smartphones without security features or very secure desktop wallets for managing your savings that are quite unpractical to use.

Melis offers the best of all worlds: simplicity and security for desktop and mobile, in the same application.

How is it done?

With Melis you can create as many single or multi user accounts as you want. An account is a “sub-part” of your wallet, customized for your needs. You can choose the level of security, and the number of co-signers. Accounts are completely independent from each other, as if they are different wallets. Every account has its own balance and addresses.

A wallet can be configured on more than one device (Home computer, smartphones, tablets..). An important concept in Melis is the “primary device”. The primary device, which can be your home computer or another computer dedicated to the management of bitcoins and nothing else, is always able to access to all the configured accounts. The first instance of the wallet is considered the primary device but it is possible to elect any other instance (but only one at once) as primary device. Each account can be configured as “secure”, which makes it visible only on the primary device.

For example you can create an account with maximum level of security (protected by server signature, with spending limits) for your savings and flag it as secure (it will be displayed only on the primary device), or a simple account (single signature) for day to day spending, available on all the devices.

In the image below are represented some use-cases. Anyway there are endless possibilities:

There are already other wallets that can create multi-signature accounts pretty easily, but the key schemes are fixed and not configurable. With Melis you can create a multi-signature account between N people, where up to N signatures are required to sign a transaction, choosing if any of those should be mandatory.

In the image below you can see an example. To send a transaction Paul and another co-signer must sign the transaction.

Is it safe?

While Melis is still a Release Candidate and there could be possible bugs, we worked hard to avoid putting user funds in danger.

At beginning of 2017 we released a beta version to a number of testers and no dangerous issues have been found so far.

It is possible to configure spending limits in a time period, by account. Even if a thief gets access to your private keys or to your wallet, he would not be able to spend more than the limited amount, and gives you enough time to prevent further thefts disabling the compromised device or securing (hiding) the accounts.

Who knows/handles the private keys?

Melis and its servers never handle user’s private keys. Each user is in total control of their own keys. It is user’s responsibility to secure at least one backup of the credentials (mnemonics).